Process of making sound-records



35 produce perfect reproductions of the matrix,

' 1W0 Drawing.

PATENT OFFICEI EDGAR M. BERLINER, 0F MONTREAL, QUEBEC, CANADA.

PROCESS OF MAKING SOUND-RECORJSS.

To all whom it may concern 7 lie it known that l, ltnoan M. BERLINnR, a citizen of the United States of America,

and a resident of Montreal, in the Province A of Quebec, Dominion of tanada, have invented certain new and useful Improvements in Processes of Making Sound-Records, of which the following is a specification.

This invention has reference to the production of sound-records and relates more particularly to the manufacture of that type of sound-records in which the phonetic characters of a matrix are reproduced in intaglio in a substance or composition which in the art is designated as the surface coatin or glaze of the record.

eretofore, been produced by the application of a glaze or surface coating to the matrix, and also to the surface of the base of the tablet or disk, the different layers of material being united by heat and pressure, and in some instances a powdered glaze which consists principally of shellac has been applied to the surface of the matrix by means of a seive. Another known method having for its object the production of sound-records, involves the use of a mixture that is rolled upon the negative matrix. The foregoing methods'or processes are typical of those known or in use and disclose various attempts that have been made to obviate or avoid the presence of air bubbles or pits in the commercial records, as well as efforts to without the employment of methods and materials the cost of which would be prohibitive.

The object of my invention is to provide the matrix with a coating, particularly that part of the matrix which contains the phonetic characters, which coating will be free from pits, air bubbles, cavities and the like and which coating is a perfect intaglio reproductionof the phonetic characters of the matrix. The result is accomplished by eliminating moisture, air, gas or any particles from between the matrix and the surface that is'being formed, also eliminating air or as from the coating material itself. This intaglio provides a sound-groove in the commercial record in which such defects in re ticles as dust, and from the trapping 0 air Specification of Letters Patent.

Application filed December 17, 1919.

sound-record tablets have Patented Oct. 12, 1920.

Serial No. 345,575.

are eliminated.

My method orprocess not only eliminates in the product or sound-record, imperfections which are incident to a perfect reproduction of the phonetic characters of the matrix, but has other advantages among which may be mentioned, the use of less coating material, a gain in the ra idity of production, less wear of the matrix, and a more perfect record surface.

My method or'process consists in projecting record surfacing material against the matrix with force sufficient to dislodge air, gases, and foreign particles from the matrix, to form a unified coating upon the matrix to which it adheres and from which it may not of itself be readily separated and han dled. it subsequently becomes a part of a sound record tablet. When this coating or film is applied to the matrix it provides a protective covering and eliminates to a great extent wear of the matrix incident to the movement of a plastic under pressure against the matrix. The coating may be reinforced for handling by projecting other material thereon while still in contact with the matrix, but it is preferably united by heat and pressure with a base that is applied while the film-like coating is still in contact with the matrix, separation from the matrix taking place on cooling. The application of the coating or surfacing material against the matrix involves the use of air, fluid or liquid under pressure or compression, to project the coating or surfacing material against the matrix.

or gas between the matrix and the coating The preferred material that I use, is shellac which may, be dissolved in alcohol, though I. may use as a coating mat'erialfor the matrix, any suitable material in a fluid or solution state or form which may be pro jected with force against the matrix and when so projected adheres thereto, uccessive or further impacts will tend to force the material intointimate adherence with the matrix to give the desired result. I do not limit myself to the application of a liquid or fluid material as a coating or surfacing material for the matrix, as shellac in a dry and pulverent or powdered form, with or without other substances may be successfully applied when projected with sufficient orce upon or against a heated matrix to form a unified coating. The force 5 it also being within the scope of my -invention to recover such solvents as may be employed to liquefy the shellac or other coating material. In practice, thecoating material that is to be projected and impacted is. preferably first reduced to a liquid state, in

which it may be heated; under pressure it is then sprayed, jetted or projected against the matrix, the material moving with high velocity strikes the matrix with considerable force, and produces a perfect intaglio of the matrix.

Theisurface coating material, is sprayed, jetted or projected against the matrix,either from a single orifice, or from a plurality of orifices. When the matrix or the source that emits the coating material is movable, or when the pressure that is app ied to the coating material is varied, a strea ma result.

he surfacing material may be applied in a heated condition to the matrix. It may be applied to a heated matrix. Successive coats of the same material or of different materials may be applied in the manner herein set forth.

In practice the coating material maybe directed against the matrix so that the direction of impact will be in line with the phonetic characters thereon, or the raised '35 portion of the matrix which forms in the .record the" sound groove, or spirally with reference to the center. or perimeter of a disk tablet.

I claim:

1. The process of producing soundrecords from a matrix having phonetic characters thereon which consists in forcibly projecting a record surfacing material against the matrix and uniting same with a base while still in contact with the matrix.

2. A step in the process of producing sound-records from a matrix having phonetic characters thereon which consists in jetting a record surfacing material against the matrix.

3. The rocess of producing a soundrecord sur ace by forcibly projecting record surfacing material against a matrix having phonetic characters thereon, to form an intaglio thereof which is united with a base b heat and pressure while still in intimate a herence with the matrix.

4. The process of producing a coating of record surfacing material on a matrix hav- ;ing phonetic characters thereon which consists in forcibly projecting a surfaclng material against the matrix and-subsequently applying such coating while on the matrix, to a base by heat and pressure, separatlon from the matrix taking place on cooling.

or spray a layer of surfacing material against the matrix, and then projecting one or more layers of other material thereon.

7. The process of forming a sound-record tablet from a matrix which consists as a step in the process in coating a sound-record matrix with a coating the outer surface of which is substantially parallel to the irregular surface of the matrix.

8. The process of forming a sound-record from a matrix whiohconsists as a step in the process in applying to a matrix a filmlike coating the thickness of which is less than the greatest depth of the negative sound groove.

9. The process of forming a sound-record surface from a matrix having phonetic characters thereon which consists in forcibly projecting record material in fluid condition against the matrix and uniting the same with a plastic base while still attached to the matrix.

tact with the matrix, and separating the i sound record so formed, from the matrix, by cooling and relievin the pressure. p

1.1. The process 0 forming sound-records from a matrix which consists in spraying record surfacing material against the matrix.

12. The process of forming sound-records from a matrix which consists as a primary step in the process in impacting a record surface in the form of spray against the negative sound record matrix.

13. The process of forming sound-records from a matrix which consists in spraying a heated surfacing material matrixQ a 14. The herein described process of coating a matrix with a sound-record surfacing material which consists in projecting in the form of spray a heated resinous material the force of the impact of the material against the matrix being such as to reproduce the sound-record thereof in said resinous material.

15. The herein described process of forming the record surface of a sound record from a matrix which consists'in spraying a comminuted resinous material with sufiicient force to coat the matrix and to expel from the material by successive impacts, air bubbles, pits. and the like, to produce in the against the solidified coatmg or glazing a. reproductlowp aaeavei of the matrix and more particularly of the raised portion of the matrix which carries the phonetic characters, and in associating such sound-record with a backing.

16. The process of forming sound-records from a matrix which consists in impacting against the matrix a cornminuted record surfacing material. a I

17. The process of forming sound-records from a matrix, which consists as a step in the process in impacting a record surfacing material in comminuted form against the sound-record face of the matrix.

18. The process of forming sound-records from a matrix, which consists as a step in the production "of the sound-record in impacting a comminuted surfacing material against the sound-record matrix and then transferring under heat and pressure the surfacing material to a sound-record base.

19. The process of coating a sound-record matrix with a surfacing material which consists in projecting and impacting a resinous surfacing material againstthe matrix to reproduce the sound-record of the matrix and then associating the surfacing material on the matrix with a sound-record base.

20. The process of coating the face of a sound-record matrix which consists in spraying a-- heated resinous surfacing material against the matrix and then associating the surfacing and record carrying material with a backing.

21. The process of forming sound-records from a heated matrix which consists in impacting a comminuted record surfacing ma-- terial against the matrix, and then associating the surfacing material with a base. i

22. The process of forming sound-records from ajheated matrix which consists in impacting a heated comminuted record surfacing material against the matrix and then associating the surface with a base.

a 23. The process of forming sound-records from a matrix which consists in impacting a record surfacing material in comminute form against a heated matrix to coat the record carrying surface of the matrix with the record surfacing material and subsequently associating the record carrying surfacing material wlth a base.

24. The process of forming sound-records from a matrix which consists in impacting successive layers of a commlnuted record surfacing material against the matrix and on one another and in then associating the surfacing material with its sound-record v rial against the phonetic characters of the matrix to provide the same with a coating, uniting such coating by heat and pressure with a plasticbase, subsequent cooling of the matrix effecting separation of the soundrecord from the matrix.

26. The process of forming sound-record tablets from a negative matrix which consists in projecting against the matrix a record surfacing material which has been reduced to fluidity to form a coating on the matrix which coating after solidification and while adhering to the matrix. is transferred to a base by pressure and heat.

27. The process of forming sound-records from a metallic negative which has thereon phonetic characters which consists in projecting a surfacing material containing shellac which has been reduced tofiuidity by a solvent against the matrix to coat the same which coating after solidification and while adhering to the matrix is transferred by heat and pressure to a plastic base the record beingseparated from the matrix by cooling and a release of pressure.

28. The process of forming sound-records from a metallic negative matrix consisting in projecting a record surfacing material which has been reduced to fluidity with a force that is sufiicient to remove an loose particles on the matrix from the piionetic characters thereof and to provide a coating which while in adherence with the matrix is subjected to heat and pressure to effect a transfer of the coating to a base.

29. The process of manufacturing soundrecords from a matrix which cons1sts as a step in the rocess in forcibly projecting record surfacing material against the matrix in a direction that follows the direction of the phonetic characters on the matrix.

30. The process of manufacturing s0undrecords from a matrix which consists as a step in the process in forcibly projecting record surfacing material in comminuted form against the matrix, the direction of the projected material being in the general direction of the phonetic characters of the matrix.

EDGAR M. BERLINER. 

